DE102018003037A1 - Fabric care product with optional crosslinked copolymer and process for finishing textiles - Google Patents

Abstract

The present invention relates to a fabric care product comprising a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent. The copolymer is used according to the invention as a soil-release agent, reduces or prevents re-soiling and improves removal of soiling.

Description

The present invention relates to the use of a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent, and a fabric care product containing such a copolymer for reducing repulping of textiles or improving the removal of stains from textiles , Moreover, the invention also relates to a process for finishing textiles with a soil release protective layer and thus to a process by which the re-soiling of textiles can be reduced and / or the removability of soiling from textiles can be improved.

The daily use of textiles, for example by wearing textile clothing, inevitably causes the textiles to become soiled. Many stains or soils, which are summarized below under the term "stains" are very difficult or with considerable effort without leaving residues from the textiles removable. This is especially true for lipophilic products, such as lubricating oils, motor oils, fats, waxes and the like, but also for example for pigments. In order to reduce the contamination of textiles so-called "soil release" additives are proposed in the art, the detergents are added, and raise during a washing process on the surface of textiles.

DE 101 525 308 A1 describes for this purpose the use of polymers of polyisocyanates and polymeric polyols. Further describes DE 10 2007 013217 A1 anionic soil release polyesters consisting of terephthalic acid, sulfoisophthalic acid (poly) alkylene glycol and a nonionic end group.

However, the soil-release agents known in the art either exhibit high selectivity for a particular soiling, meaning that only one particular type of soil, for example, only oil-based soils, or only pigments or other more hydrophilic soils, are removed or unfolded Range of action only on a certain type of tissue, for example, only on polyamides or on cotton-based tissues.

Based on this prior art, it is an object of the present invention to provide a use of a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent and a fabric care product which prevents and / or reduces texturing repellency or the removability of stains from the textiles improved. Further, it is an object of the present invention to provide a method of finishing textiles having a soil-release protective layer that protects textiles from re-soiling and / or removes stains that can be easily applied to the textile.

tert-Butylmethacrylat (tBMA):

Surprisingly, it has been found that this object is achieved by the use of a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent (in short: NIPAM-co-tBMA). The N-isopropylacrylamide units and tert-butylmethacrylate units contained in the copolymer are represented by the following formulas:
N-Isopropylacrylamide (NIPAM):

tert-butyl methacrylate (tBMA):

Without being bound by theory, it is believed that due to their chemical constitution, the N-isopropylacrylamide units contained in the copolymer are very well suited for and apply to various types of fabrics, such as cellulose-based fabrics (cotton), polyamide fabrics, polyester fabrics, blended fabrics, and the like forming a kind of protective layer or protective film which prevents unimpeded access of soiling to or into the tissue and thus prevents or effectively reduces or even prevents soiling or re-soiling. Further, it is believed that the tert-butyl methacrylate units in the copolymer facilitate remover removal from or from the fabric due to the high hydrophilic content of the methacrylate units.

The methacrylate content in the tert-butyl methacrylate units also promotes film formation on the fabric so that a so-called soil-release protective layer is uniformly formed on the surface of the fabric can. In this case, a comprehensive "protective cover" of the textile fabric is promoted by the sterically demanding chains of N-Isopropylacrylamideinheiten and tert-Butylmethacrylateinheiten, so that unimpeded access of soiling to or into the tissue is prevented or at least significantly reduced. The tert-butyl modification of tert-Butylmethacrylateinheiten also ensures that hydrophobic stains, such as oils, fats and the like, do not even penetrate into the tissue, but are intercepted on the surface, so that a washing out of soiling is very easy ,

In sum, the copolymer used according to the invention is distinguished by high hydrophilic but also lipophilic fractions, so that further soiling of different types, ie lipophilic soiling such as, for example, fats, waxes or oils, and also hydrophilic soiling, such as, for example, pigments and the like, diminished or even prevented or removed very easily.

The copolymer used according to the invention is preferably present in the form of a hydrogel. For the purposes of the invention, the term "hydrogel" is understood as meaning a water-containing, but water-insoluble copolymer whose molecules are linked chemically, for example by covalent or ionic bonds, or physically, for example by looping of the polymer chains, to form a three-dimensional network. The hydrogel has the property because of the high hydrophilic proportions in the copolymer in water to swell under considerable volume increase without losing the material cohesion. In this way, a detachment and removal of stains can be facilitated and thus improved.

As the crosslinking agent, any of the N-isopropylacrylamide units and / or tert-butylmethacrylate units crosslinking agents can be used. Preferably, crosslinking agents that crosslink the acrylamide moieties and methacrylate moieties, such as, in particular, N, N'-methylenebisacrylamide (MBA), which is a symmetrical unconjugated bifunctional vinyl monomer, are employed.

In the copolymer used in the present invention, the molar ratio of N-isopropylacrylamide to units obtained from the crosslinking agent is preferably in the range of 1000: 1 to 10: 1, more preferably 200: 1 to 20: 1, and particularly preferably 50: 1 to 25: 1 ,

Further, according to the present invention, there is also disclosed a fabric care product containing at least one copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent. This implies that the fabric care product of the invention contains one or more copolymers consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent.

In the context of the present invention, "textile care product" means any washing, cleaning and care agent used for cleaning and care of textiles, such as home and clothing textiles. These include in particular heavy duty detergents, special detergents, such as, for example, mild detergents, wool detergents and the like, washing auxiliaries, laundry care preparations, laundry sprays, ironing auxiliaries, laundry pre-treatment agents and laundry aftertreatment agents.

To avoid redundancy, reference is made to the above explanations for the definition of the consisting of N-Isopropylacrylamideinheiten, tert-Butylmethacrylateinheiten and optionally at least one crosslinking agent copolymer as well as the effects achieved according to the invention.

It has surprisingly been found that can be prevented by the fabric care product according to the invention stains or Wiederanschmutzungen of textiles of different types or these are effectively reduced and also a removal of soiling from the textiles is facilitated. It is believed that in order to achieve these effects, the copolymer consisting of N-isopropylacrylamide units, tert-butyl methacrylate units and optionally at least one crosslinking agent is applied to the textile fabric and forms a kind of protective layer or protective film which prevents or at least reduces stains and their Remove relieved. The textiles treated with the fabric care product according to the invention thus remain clean longer and can be obtained even after several washes without traces of previously existing soils. It has been found that the protective layer can be formed on different types of fabric, such as polyester-based fabric, cellulose-based fabric, polyamide-based fabric and any type of blended fabric. It has also been found that by using the textile care product according to the invention different types of soiling, ie both lipophilic soiling and hydrophilic soiling can be reduced or even prevented or effectively removed.

An advantageous development of the textile care product according to the invention is characterized in that the total mass of N-Isopropylacrylamideinheiten, tert-Butylmethacrylateinheiten and optionally at least one crosslinking agent existing copolymer, based on the total mass of the fabric care product, 0.001 mass% to 10 mass%, in particular 0.01 Mass% to 5 mass% and in particular 1 mass%. When several copolymers of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent are used in combination, the total mass refers to the total mass of all copolymers comprised of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent in the fabric care product , In other words, if two copolymers composed of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent are used in combination, their total mass is 0.001 mass% to 10 mass%. If only one copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent is present in the fabric care product according to the invention, its total mass is also preferably 0.001 mass% to 10 mass% and in particular 0.01 mass% to 5 mass%.

Already a small total mass of the copolymer used according to the invention of 0.001% by weight, and in particular of 0.01% by weight, causes a significant reduction in soiling and an improvement in the removability of stains that accumulate on the textile fabric. It can therefore be assumed that even a total mass of 0.001% by weight of the copolymer to be used according to the invention leads to the formation of a fabric-protecting soil release protective layer, which is distinguished by a soil-repelling effect: the higher the proportion of N-isopropylacrylamide units , tert-Butylmethacrylateunheiten and optionally at least one crosslinking agent of existing copolymer, the larger and more homogeneous this protective layer is formed on the fabric surface. Soiling can be particularly effectively reduced or even prevented if the total mass of this copolymer 0.01 mass% to 5 mass%. The spectrum of action is particularly balanced in this area. Higher total masses of more than 5% by mass or even more than 10% by mass are disadvantageous in terms of the cost of the fabric care product, especially from a total mass of more than 10% by mass of the copolymer does not significantly increase the soil-repellent effect and no further improvement the removability of stains is noticeable. Rather, at such high levels of consisting of N-Isopropylacrylamideinheiten, tert-Butylmethacrylateinheiten and optionally at least one crosslinking agent copolymer, the haptic properties of the textile can be impaired.

According to an advantageous development, the textile care product contains at least one surfactant. The surfactant improves the removal of stains. The addition of one or more surfactants is particularly advantageous if the textile care product in the form of a detergent, such as a heavy duty detergent, a mild detergent or a special detergent, is present.

A surfactant in the sense of the present invention is a surface-active substance which by micelle formation is able to dissolve dirt particles during a washing process with the textile care product from the textile or textiles. Suitable surfactants include cationic, anionic, nonionic and amphoteric surfactants. Any mixtures of two or more surfactants can be used depending on the desired washing performance.

Suitable anionic surfactants include, but are not limited to, alkylbenzenesulfonates, olefin sulfonates, alkanesulfonates, fatty alcohol sulfates, fatty alcohol ether sulfates or a mixture of two or more of these anionic surfactants. Of these anionic surfactants, alkylbenzenesulfonates, fatty alcohol ether sulfates and mixtures thereof are particularly preferred.

Preferred surfactants of the sulfonate type are alkylbenzenesulfonates, olefinsulfonates, ie mixtures of alkene and hydroxyalkanesulfonates and disulfonates, as are obtained, for example, from C _12-18 -monoolefins having terminal or internal double bonds by sulfonation with gaseous sulfur trioxide and subsequent alkaline or acidic Hydrolysis of the sulfonation obtained. Also suitable are C _12-18 alkanesulfonates and the esters of α-sulfo fatty acids (ester sulfonates), for example the α-sulfonated methyl esters of hydrogenated coconut, palm kernel or tallow fatty acids.

Alkylbenzenesulfonates are preferably selected from linear or branched mono- and dialkylbenzenesulfonates. The alkyl radicals may contain, individually or together, 9 to 19, preferably 9 to 15, and in particular 9 to 13 C-atoms. A most preferred representative is sodium dodecylbenzylsulfonate.

As alk (en) ylsulfate are the salts of sulfuric acid half esters of C ₁₂ -C ₁₈ fatty alcohols, for example from coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or C ₁₀ -C ₂₀ -oxo alcohols and those half esters secondary alcohols of these chain lengths are preferred. Of washing technology interest, the C ₁₂ -C ₁₆ alkyl sulfates and C ₁₂ -C ₁₅ alkyl sulfates and C ₁₄ -C ₁₅ alkyl sulfates are preferred.

Also alkyl ether sulfates having the formula R ^{1 is} -O- (AO) _n -SO ₃ ^- X ⁺ are suitable. In this formula, R ^{1 is} a linear or branched, substituted or unsubstituted alkyl radical, preferably a linear, unsubstituted alkyl radical, more preferably a fatty alcohol radical. Preferred radicals R ¹ are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl and eicosyl radicals and mixtures thereof, where the even number at C atoms are preferred. Particularly preferred radicals R ¹ are derived from C ₁₂ -C ₁₈ fatty alcohols, for example coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or C ₁₀ -C ₂₀ oxo alcohols.

AO represents an ethylene oxide (EO) or propylene oxide (PO) moiety, preferably an ethylene oxide moiety. The subscript n stands for an integer from 1 to 50, preferably from 1 to 20, and especially from 2 to 10. Most preferably, n stands for the numbers 2, 3, 4, 5, 6, 7 or 8. X stands for a monovalent cation or the nth part of an n-valent cation, preference is given to the alkali metal ions and below Na ⁺ or K ⁺ , with Na ^{+ being} extremely preferred. Other cations X ⁺ may be selected from NH ₄ ⁺ , ½Zn ²⁺ , ½Mg ²⁺ , ½Ca ²⁺ , ½Mn ²⁺ and mixtures thereof.

The anionic surfactants may be in the form of their sodium, potassium or magnesium or ammonium salts. Preferably, the anionic surfactants are in the form of their sodium salts and / or ammonium salts. Amines which can be used for the neutralization are preferably choline, triethylamine, monoethanolamine, diethanolamine, triethanolamine, methylethylamine or a mixture thereof, with monoethanolamine being preferred.

Suitable nonionic surfactants include alkoxylated fatty alcohols, alkoxylated oxo alcohols, alkoxylated fatty acid alkyl esters, fatty acid amides, alkoxylated fatty acid amides, polyhydroxy fatty acid amides, alkylphenol polyglycol ethers, amine oxides, alkyl (poly) glucosides, and mixtures thereof.

R²

für einen linearen oder verzweigten, substituierten oder unsubstituierten Alkylrest,

AO

für eine Ethylenoxid-(EO) oder Propylenoxid-(PO)-Gruppierung und

m

für ganze Zahlen von 1 bis 50 stehen.

Preferred fabric care products contain at least one fatty alcohol alkoxylate of the formula R ^{2 is} -O- (AO) _m -H in the

R ²

a linear or branched, substituted or unsubstituted alkyl radical,

AO

for an ethylene oxide (EO) or propylene oxide (PO) moiety and

m

stand for integers from 1 to 50.

In the abovementioned formula, R ^{2 is} a linear or branched, substituted or unsubstituted alkyl radical, preferably a linear, unsubstituted alkyl radical, particularly preferably a fatty alcohol radical. Preferred radicals R ² are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl and eicosyl radicals and mixtures thereof, where the representatives with an even number of C Atoms are preferred. Particularly preferred radicals R ² are derived from C ₁₂ -C ₁₈ fatty alcohols, for example coconut oil fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or C ₁₀ -C ₂₀ oxo alcohols.

AO represents an ethylene oxide (EO) or propylene oxide (PO) moiety, preferably an ethylene oxide moiety. The subscript m is an integer from 1 to 50, preferably from 1 to 20, and especially from 2 to 10. Most preferably, m is the numbers 2, 3, 4, 5, 6, 7 or 8.

According to a further advantageous embodiment, in order to obtain a particularly good washing performance with high soil release force, provided that the total mass of surfactant, ie the total mass of one or more surfactants, based on the total mass of the fabric care product, 1 mass% to 50 mass% and in particular 3% by mass to 20% by mass. When using a combination of two or more surfactants, the total amount of surfactant refers to the total mass of all surfactants used.

Further preferably, the fabric care product is powdery, liquid, gel, in the form of tabs or capsules. In this case, the liquid form is particularly preferred, since in liquid fabric care products consisting of N-Isopropylacrylamideinheiten, tert-Butylmethacrylateinheiten and optionally at least one crosslinking agent hydrated and thus in particular in the form of a hydrogel, which is particularly easy to apply to textiles and can form a stain-resistant protective layer ,

The fabric care product may contain other common ingredients. All amounts stated in connection with the ingredients of the fabric care product described herein are, unless otherwise stated, to mass%, in each case based on the total mass of the fabric care product.

Furthermore, such amounts referring to at least one ingredient will always refer to the total amount of that type of ingredient contained in the fabric care product, unless explicitly stated otherwise. That is, such quantities, for example in connection with "at least one surface-active substance", refer to the total amount of surface-active substances contained in the textile care product.

"At least one" as used herein refers to 1 or more, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9 or more. In the context of ingredients of the fabric care product described herein, this indication does not refer to the absolute amount of molecules but to the nature of the ingredient. Thus, for example, "at least one enzyme" or "at least one surfactant" means one or more different enzymes or surfactants, i. one or more different types of enzymes or surfactants. Together with quantities, the quantities refer to the total amount of the corresponding designated type of ingredient as defined above.

In addition, the textile care product of the invention may also contain other ingredients that further improve the performance and / or aesthetic properties of the fabric care product. In the context of the present invention, the textile care product preferably additionally contains one or more substances from the group of bleaches, enzymes, complexing agents, builders, electrolytes, nonaqueous solvents, pH adjusters, perfumes, perfume carriers, fluorescers, dyes, hydrotropes, foam inhibitors, silicone oils , Anti-redeposition agents, graying inhibitors, anti-shrinkage agents, anti-wrinkling agents, color transfer inhibitors, antimicrobial agents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bittering agents, ironing aids, repellents and impregnating agents, swelling and anti-slip agents, plasticizing components and UV absorbers.

The bleaching agent may be any substance which, by oxidation, reduction or adsorption, destroys or absorbs dyes and thereby discolors materials. These include u.a. hypohalite-containing bleaches, hydrogen peroxide, perborate, percarbonate, peroxoacetic acid, diperoxoazelaic acid, diperoxododecanedioic acid and oxidative enzyme systems.

Builders which may be present in the textile care product include, in particular, silicates, aluminum silicates (in particular zeolites), carbonates, salts of organic di- and polycarboxylic acids and mixtures of these substances.

Organic builders which may be present in the fabric care product are, for example, the polycarboxylic acids which can be used in the form of their sodium salts, polycarboxylic acids meaning those carboxylic acids which carry more than one acid function. For example, these are citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids and mixtures of these. Preferred salts are the salts of polycarboxylic acid, citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids and mixtures thereof.

As builders further polymeric polycarboxylates are suitable. These are, for example, the alkali metal salts of polyacrylic acid or polymethacrylic acid, for example, those having a molecular weight of 600 to 750,000 g / mol.

Suitable polymers are in particular polyacrylates, which preferably have a molecular weight of from 1,000 to 15,000 g / mol. Because of their superior solubility, the short-chain polyacrylates, which have molecular weights of from 1,000 to 10,000 g / mol and more preferably from 1,000 to 5,000 g / mol, may again be preferred from this group.

Also suitable are copolymeric polycarboxylates, in particular those of acrylic acid with methacrylic acid and of acrylic acid or methacrylic acid with maleic acid. To improve the water solubility, the polymers may also contain allylsulfonic acids, such as allyloxybenzenesulfonic acid and methallylsulfonic acid, as a monomer.

In liquid textile care products, preference is given to using soluble builders, such as, for example, citric acid, or acrylic polymers having a molar mass of from 1,000 to 5,000 g / mol.

Liquid fabric care products more preferably contain water as the main solvent. It is preferred that the textile care product contains more than 5% by weight, preferably more than 15% by weight and especially preferably more than 25% by weight, based in each case on the total mass of textile care product, of water. Especially preferred liquid fabric care products contain from 5% by weight to 90% by weight, preferably 10% by weight to 85% by weight, more preferably 25% by weight to 75% by weight and most preferably 35% by weight to 65% by weight of water.

Alternatively, the fabric care product of the present invention may be a low-water to anhydrous fabric care product wherein the total weight of water in a preferred embodiment is less than 10% by weight, and more preferably less than 8% by weight, based on the total weight of the fabric care product.

In addition, non-aqueous solvents may be added to the fabric care product. Suitable non-aqueous solvents include mono- or polyhydric alcohols, alkanolamines or glycol ethers, provided that they are miscible with water in the specified concentration range. Preferably, the solvents are selected from ethanol, n-propanol, i-propanol, butanols, glycol, propanediol, butanediol, methylpropanediol, glycerol, diglycol, propyldiglycol, butyldiglycol, hexylene glycol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol methyl ether, Diethylene glycol ethyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol propyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, methoxytriglycol, ethoxytriglycol, butoxytriglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol t-butyl ether, di-n-octyl ether and mixtures thereof Solvent. However, it is preferred that the fabric care product contain an alcohol, especially ethanol and / or glycerol, between 0.5 and 5% by weight, based on the total weight of the fabric care product.

To the optionally present, in particular in liquid textile care products, conventional enzyme stabilizers include amino alcohols, for example mono-, di-, triethanol- and propanolamine and mixtures thereof, lower carboxylic acids, boric acid, alkali metal borates, boric acid-carboxylic acid combinations, boric acid esters, boric acid derivatives, calcium salts, for example Ca-formic acid combination, magnesium salts, and / or sulfur-containing reducing agents.

Other surfactants include soaps, with soaps of C ₁₂ -C ₁₈ fatty acids being preferred. They may also be in the form of their sodium, potassium, magnesium or ammonium salts.

The fabric care product of the invention may contain one or more enzymes.

In principle, all the enzymes established in the prior art for this purpose can be used in this regard. Preferably, it is one or more enzymes capable of exhibiting catalytic activity in a fabric care product, in particular a protease, cellulase, amylase, lipase, mannanase, pectin-splitting enzyme, tannase, xylanase, xanthanase, β-glucosidase, carrageenase, perhydrolase , Oxidase, oxidoreductase and their mixtures. Preferred hydrolytic enzymes include in particular proteases, amylases, in particular α-amylases, lipases, in particular pectinase, mannanase, β-glucanases, and mixtures thereof. These enzymes are basically of natural origin. Starting from the natural molecules, improved derivatives are available for use in textile care products, which are preferably used accordingly.

• a. Bereitstellen eines wie vorstehend definierten Textilpflegeprodukts und
• b. In-Kontakt-Bringen eines Textils mit dem Textilpflegeprodukt.

Furthermore, according to the invention, a process for finishing textiles with a soil release protective layer is described which comprises the following process steps:

• a. Providing a fabric care product as defined above and
• b. Contacting a textile with the fabric care product.

For this purpose, the textile care product can be prepared in the form of a solution (wash liquor) in order to facilitate contact with the textile. By applying or carrying out the method according to the invention, the textiles treated according to the invention are provided with a type of dirt-repellent protective layer which effectively reduces or even prevents soiling and facilitates removal of stains or repellencies that accumulate on the textile and thus improves.

It is believed that stains caused by the process are prevented from penetrating into the textiles and at most remaining on their surface, and in particular on the protective layer or protective film. They can be removed from there very easily, for example, by being dissolved with a part of the protective layer or even with the entire protective layer, and in this case in particular washed out. Washing out is promoted in particular by the hydrophilic fractions of the copolymer, that is to say in particular the tert-butyl methacrylate units. The process is simple and can be implemented without great technical effort and protects the treated textiles from contamination. Here are the beneficial effects for different types of textile (for example, cotton-based textiles, polyamide-based textiles, polyester-based textiles and any type of blended fabric) and for different soiling (hydrophilic and hydrophobic soiling) achieved.

According to another aspect of the present invention, there is also described the use of a fabric care product as disclosed above to reduce textile repellency and improve the removal of fabric soils. These effects are provided by the copolymer present in the fabric care product according to the invention consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent for different types of textile (for example cotton-based textiles, polyamide-based textiles, polyester-based textiles and blended fabrics) and achieved different soiling.

Examples

Example 1: Preparation of NIPAM-co-tBMA

According to the following preparation instructions, a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and crosslinking agents (in short: NIPAM-co-tBMA polymer) was prepared:

To a heated under nitrogen atmosphere at 90 ° C solution of 17.11 g of N-isopropylacrylamide (NIPAM) and 0.79 g of N, N'-methylenebis (acrylamide) (BIS) in 940 mL of degassed water was added under constant stirring to 90 ° C. Add a solution of 2.12 g of tert-butyl methacrylate (tBMA) in 140 mL of degassed water. Subsequently, a solution of 0.36 g of cetyltrimethylammonium chloride (CTAB) in 100 mL of degassed water was added. Further, a solution of 0.7 g (2.6 mmol) of 2,2'-azobis (2-methylpropionamidine) dihydrochloride (AAPH) in 25 mL of degassed water was added to start the polymerization reaction. The reaction mixture was kept under constant stirring (300 rpm) for 4 h at 85 ° C under a nitrogen atmosphere and then cooled with constant stirring (300 rpm) to room temperature.

The NIPAM-co-tBMA was obtained in 68% yield and had a hydrodynamic radius (R _h ) of 76 in water at 20 ° C. The zeta potential in water at 20 ° C was 0 mV.

Example 2: Liquid Fabric Care Products

The following fabric care products were prepared by mixing the ingredients listed in Table 1. The fabric care products V1 and V2 are non-inventive formulations which serve as references while the fabric care product E1 is an embodiment of the invention containing a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and a crosslinking agent. So copolymer, the copolymer of Example 1 was used. Table 1: Composition of textile care products [mass%] V1 V2 E1 boric acid 1 1 1 citric acid 2.2 2.2 2.2 Anti-foaming agents 0.03 0.03 0.03 surfactants 18 18 18 Fatty acid of palm kernel oil 2.25 2.25 2.25 NaOH 2,334 2,334 2,334 glycerin 2.5 2.5 2.5 preservative 0.05 0.05 0.05 ethanol 1.25 1.25 1.25 Phosphonate DTPMP 0.5 0.5 0.5 brighteners 0,035 0,035 0,035 enzyme mix 0,836 0,836 0,836 Perfume 0.741 0.741 0.741 dye 0,006 0,006 0,006 Poly-NIPAM - 1 - NIPAM-co-tBMA - - 1 water on 100

The pH of the fabric care products was between 8.2-8.6. The density of the fabric care products was 1.044-1.054 g / cm ³ at 20 ° C.

Example 3: Soil-release effect

3.5 kg of clean ballast wash (including the following test textiles: pillow, tricot, kitchen towel) were washed three times with 66 mL each of the textile care products (V1, V2, E1) from Example 2 in a Miele W 918 Novotronic® with a wash volume of 17 L and a water hardness of 16 ° dH at 40 ° C. After the washing process, the laundry was dried in air.

Subsequently, the test textiles were soiled with standardized soils and kept for 7 days at room temperature. The test textiles were then together with the remaining ballast wash again in a wash liquor containing 66 mL of the same fabric care product of Example 2 as previously used, under the conditions described above. The remaining spot intensity was determined with a DATA-COLOR Spectra Flash SF500 reflectance spectrometer.

Table 3 shows the obtained stain intensity test results. TABLE 3 Results of stain intensity soiling Textile V2 E1 Make Up 1 cotton 8.0 14.4 lard polyester 1.6 3.4 Make Up 1 polyester 4.1 8.9 Make Up 2 polyester 6.4 9.0 Shoe polish black polyester 12.1 19.6 Make Up 3 cotton 12.0 14.1 lipstick polyester 0.8 1.1

Indicated are delta-delta Y values compared to the use of the detergent V1. For the soils used, the E1 fabric care product containing a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and a crosslinking agent showed the best test results.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 101525308 A1 [0003]
• DE 102007013217 A1 [0003]

Claims (10)

Use of a copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent as soil release active ingredient in textile care products for textiles. A fabric care product comprising at least one copolymer consisting of N-isopropylacrylamide units and tert-butylmethacrylate units and optionally at least one crosslinking agent. Textile care product after Claim 2 in which the total mass of copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent, based on the total mass of the fabric care product, is 0.001 mass% to 10 mass%. Textile care product after Claim 2 or 3 in which the total mass of copolymer consisting of N-isopropylacrylamide units, tert-butylmethacrylate units and optionally at least one crosslinking agent, based on the total weight of the textile care product, is 0.01% by mass to 5% by mass and in particular 1% by mass. Textile care product according to one of Claims 2 to 4 wherein the fabric care product further comprises at least one surfactant, wherein the total weight of surfactant, based on the total weight of the fabric care product, is 1% by weight to 50% by weight, especially 10% by weight to 25% by weight. Textile care product according to one of Claims 2 to 5 , wherein the fabric care product is powdered, liquid, gel, in the form of tabs or capsules. Textile care product according to one of Claims 2 to 6 wherein the fabric care product is in the form of a washing aid, a laundry care product, or a laundry aftertreatment agent. A method of finishing textiles with a soil release protective layer comprising the steps of: a) providing a fabric care product according to any one of Claims 2 to 7 and b) contacting a textile with the fabric care product. Use of a fabric care product according to any one of Claims 2 to 7 to reduce the re-soiling of textiles. Use of a fabric care product according to any one of Claims 2 to 7 to improve the removal of stains from textiles.